Nonvibratory shear member for hair clippers



Oct. 19, 1937. M. ANDIS NONVIBRATORY SHEAR MEMBER FOR HAIR CLIPPERS Filed March 5, 1936 ATTORNEY-5.

Patented Oct. 19, 1931 PATEN T OFFICE woman-roar smnm mamas son HAIR currnas Mathew Andis, Racine, Wis.

Application March 5, 1936, Serial No. 87,194

8 Claims.

My invention relates to improvements in nonvibratory shear members for hair clippers andmethods of manufacturing the same.

The object of my invention is to provide a laminated shear member, the various plies of which may be struck up from sheet metal and subsequently assembled.

More particularly, my object is to provide a method whereby the shear members of hair clippers may be formed by first blanking out and stamping pieces of sheet metal in such a manner that when assembled, soldered together, and the working faces ground to the desired contour, they will form a shear having spaced teeth suitable for cooperation with those of a vibratory cutter in the same manner as in an ordinary hair clip- Figure 1 is a side view of one embodiment of I my invention, inwhich the teeth have the form of arcuately curved bars, to the inner surfaces of which a vibratory cutter may be fitted.

Figure 2 is a plan view of the same, partially broken down in horizontal section to a plane exposing the embossed interlocking portions and a fragment of the connections for operating the vibratory bar.

Figure 3 is a perspective view of one of the end blanks.

Figure 4 is a similar view showing one of the central blanks.

Figure 5 is a fragmentary perspective view of a shearing comb plate embodying my invention, a small fragment of a superposed cutter bar being also illustrated.

Figure 6 is a fragmentary view of a working portion of one of the blanks, showing a modification.

Like parts are identified by the same reference characters throughout the several views.

In the practice of my improved method, I cut sheets of steel plate into sets of blanks, prefere ably having the forms illustrated in Figures 3 and 4, although, if desired, their working portions may have the form illustrated in Figure 6. In Figure 3 the portions it are cylindrically curved and adapted to constitute the. shearing toothed working portions of the end blanks when the blanks are finished and assembled.

Back of these working portions each blank is punched out to form a cylindrical aperture II, in the rear of which the body portion i2 is embossed to provide sockets IS on one side and corresponding projections I4 on the other side, as best shown in section in Figure 2. Shank portions l5 project rearwardly from the body portions i2, and these may be provided with a notch or notches it to facilitate connecting the assembled shear bar with a handle.

Another series of blanks, having the form illustrated in Figure 4, has portions Illa, similar to the portions ill shown in Figure 3. These blanks aresimilarly punched to form apertures as indicated at Ila. The body portions 12a of these blanks are cut away, as indicated at IT, to provide an opening through which an actuating arm l8 may be connected with a vibratory cutter bar i9, as shown in Figure 2. The bodies I2a are embossed as indicated at i 3a, in correspondence with the embossed portions l3 of the blanks shown in Figure 3.

In the blanking operation, the portions ill of each end blank and the portions Illa of each of the central blanks, 'or the portions iiib shown in Figure 5 or we shown in Figure 6, are pressed or inset laterally on one side to provide arcuate channels 20 in one side of each working portion. These insetting effects may be accomplished by applying suflicient pressure to bring about molecular displacement, or, if desired, the entire toothed portion may be offset to produce a corresponding projection on the other side which will be subsequently ground away before assembling the blanks.

It is not material to the invention herein disclosed whether the blank is cut away between the portions l0 or whether the contiguous ends of the portions iii are connected by a web 22, as shown in Figures 3, 4. If cut away, the material may be removed, (Fig. 6), in the blanking operation, or when finishing.

After the blanks have been formed, they are tempered and then assembled in sets, as best indicated in Figure 2, the set of intermediate blanks being disposed between two sets of end blanks. A suilicient number of blanks are assembled to provide a shear plate of the desired length, and the blanks are then soldered to gether to provide a single shear assembly, after which the working portions are cylindrically ground to provide teeth of the desired thinness tions of the sets of teeth, said teeth progressively increasing in thickness in the direction of the bodies I2 and Ho of the blanks. Thisvariation in thickness allows the shearing portions of the teeth to be made extremely thin in a plane normal to their working surfaces, with adequate support derived from the thicker rear portions, whereby displacement under pressure of, the working portion upon the scalp is prevented.

' The completed shear may then be secured to a suitable handle, which will preferably be divided longitudinally, and provided with ribs 25 on its respective half portions which may engage in the channels formed by the notches If in the end blanks, as clearly shown in Figure 1. If necessary, the aperture 11 may be reamed out to form a cylindrical bore, within which a vibratory cutter bar may be fitted. v 1

Referring now to Figure 5, it will be'observed that the bodies 21 of the blanks are cut in accordance with the contour of an ordinary shearing comb plate having teeth 28 which are compressed and densified to inset them and thus provide hair receiving spaces between the teeth in the same manner as when forming the arcuate shear bars shown in Figures 1 and 2. The blanks illustrated in Figure 5 may be assembled, soldered, and ground, or otherwise finished'to receive a superposed vibratory cutter 29 which may be reciprocated by any ordinary means. The blanks assembled to form a shearing comb plate of this type may have any desired number of interlocking embossed sockets l3b, punched or pressed into \the blank during the blanking operation, to pro vide corresponding interlocking projections on the opposite side. In Figure 5, three sockets l3b are illustrated.

In Letters Patent for Hair clippers and shaving clippers, No. 2,037,957, granted to me April 21, 1936, pursuant to a companion application Serial No. 581,634, I have disclosed without claiming, shear teeth which are made extremely thin in their working portion and progressively thickened in the direction of the body, the increasing thickness being in a plane normal to the bearing surfaces of the tooth. In another companion application for Hair combing, clipping, and shaving heads, Serial No. 67,195, filed March 5, 1936, I have described and claimed such teeth with additional disclosures as to their form and functions,

and this application includes an improvement in that teeth having such forms are densified and tempered with reference to the purposes .in view.

I claim:

1. A hair clipper shear, comprising a set of plates in laminated assembly, said plates being inset laterally on one side along their working surfaces, the inset portion of each lamination being marginally contoured in the form of a shear tooth and spaced from the next tooth to the extent of the inset, said laminations being rigidly secured together in the rear of such teeth.

' in the shearing portions or contiguous end por- 2. A hair clipper shear comprising a laminated assembly rigidly secured together, each lamination having a comb tooth inset and densifled along one side to form a hair receiving space between it and the next tooth.

a A hair clipper shear comprising a laminated assembly having shear teeth provided with combing and shearing portions densifled and reduced in transverse dimension, said teeth being thereby spaced from each other suiiiciently to allow hair to enter between them, and having tempered cutting margins contoured to provide bearings for a complementary vibratory cutter.

4. A hair clipper shear, comprising a laminated assembly having each lamination punched to provide a guideway for a vibratory cutter bar and shaped to provide a shear tooth at one side of said guideway, densiiied and spaced from the tooth of an adjacent laminated member to provide combing and shearing portions, said laminations being interlocked and soldered together to form a unitary shear member.

5. A hair clipper shear, comprising a laminated assembly having each lamination punched to provide a guideway for a vibratory cutter bar and shaped to provide a shear tooth at one side of said guideway adapted for combing and shearing purposes, each tooth densified and spaced from the tooth of an adjacent laminated member in said combing and shearing portions, said laminations being interlocked and soldered together to form a unitary shear member, said teeth having pointed ends and of a thickness progressively increasing from the pointed ends rearwardly along the cutter bar guideway in planes substantially normal to their bearing surfaces.

6. A laminated hair clipper shear, the laminations comprlsing pieces of stamped sheet metal each having a portion densiiled and relatively reduced in thickness between its side surfaces, said densified portion being contoured to form a shear tooth, and said laminations being interlocked to form a shear assembly having a shank portion for engagement with a support.

7. A laminated hair clipper shear, the laminations comprising pieces of stamped sheet metal each having a portion densified and relatively reduced in thickness between its side surfaces, said densified portion being contoured to form a shear tooth, means for interlocking said laminations to form a shear bar assembly, and a shank adapted for engagement with a support, said lamination also having a punched out intermediate portion adapted to receive a cutter bar in the rear of the densified portion and in shearing relation thereto.

8. A hair clipper shear bar having a supporting rear portion and forwardly projecting teeth densifled, tempered, and of progressively increasing thickness from their forward end portions rearwardly to the supporting portion in planes substantially normal to the outer surfaces of the teeth at the points intersected by such planes.

' MATHEW ANDIS. 

